From the acetone extract of the root of Euphorbia sieboldiana, a new ent-atis-16-ene type diterpenol was isolated and its structure was demonstrated as ent-atis-16-ene-13 α-hydroxy-3,14-dione (1) based on the chemical as well as NMR and MS spectroscopic evidences, and finally confirmed by X-ray diffraction.

中文翻译：

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大戟（Euphorbia sieboldiana）的一种新的ent -atis-16-ene型二萜

从大戟大戟根的丙酮提取物中分离出一种新的ent -atis-16-ene型双萜，其结构被证明为ent -atis-16-ene-13α-hydroxy-3,14-dione（1 ）基于化学以及NMR和MS光谱学证据，最后通过X射线衍射确认。